Are there any immediately useful applications to this? Maybe not, but it’s still a really cool idea: Inspired by Dan Wagoner, Instructables member NOI7734 has built an Arduino-powered lockbox/giftbox that requires you to win a game of Hangman to access the goodies within.
A few pics:
*Note: This is the new best Hangman word.
You’ll need to be reasonably technically skilled to put one together yourself — expect to handle a soldering iron and program an Arduino board with Atmega328 — but full assembly instructions are available over at Instructables.
Have a tip we should know? firstname.lastname@example.org